Ribbed Side Edging:
On odd numbered rows: Work the first 5 and last 5 stitches on each row as: K1, p1, k1, p1, k1
On even numbered rows: Work the first 5 and last 5 stitches on each row as: P1, k1, p1, k1, p1.

Finishing: Knit a row, purl a row, Knit a row,
Bind off in this manner: *P2tog, slip stitch just worked back onto left needle, p2tog, repeat from * to end of the row.

Note: The 2-stitch stockinette edging on either side , as well as the top border of stockinette are going to curl/roll because unblocked stockinette will do that. This is intentional, and creates a nice rolled edge.